Slide-valve motor



W. .C. DUNN SLIDE VALVE MOTOR Aug. 26, 1930.

W. 1 lb m t H u e m 0 S n6 I s m t w W h 10: N S 0 a 0 4 x 3 N X\ m w w 7 2 2 3 u 5 w 3 llllll i w mw A a d m l .1 3 n F n w 0 a 3 5 Z m Aug. 26, 1930. w. c. DUNN SLIDE VALVE MOTOR 3 SheetsSheet 2 Filed Aug. 25. 1927 Inventor will/am Dunn Aug. 26, 1930. w. c.- DUNN 1,773,971

SLIDE VALVE MOTOR 7 Filed Aug. 25, 1927 5 Sheets-Sheet 3 Inuenfor william C. Dun n Patented Aug. 26, 1 930 WILLIAM G. Dunn-,- or cfigxoA'eo, ILLINOIS SLIDE-VALVE' Moron Application filed, August 25 1927 .Seria 1 No..215,327.

This invention relates to improvements in slide valve motors, and has for its Object improved means for sealing the valves around and adjacent the ports.

@k further object of the invention. is to improve the construction of the motor in such a manner that the slide valves may be readily removed through the topof the motor, thereby rendering it easy to remove the valves when desired.

To the attainment of these ends'and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement. of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and in which- Figure 1 is a vertical longitudinal sectional View of an engine constructed in accordance with the principles of this invention.

Figure 2 isa detail horizontal sectional view taken on line 22, Figure 4.

.Figure 3 is a detail horizontal sectional view taken on line 8-3, Figure 5.

Figure 4 is a sectional view taken on line 4-4, Figure 2.

Figure 5 is an elevation taken on line 5-5, Figure 3, with parts broken away.

Figure 6 is an enlarged detail and frag mentary view of the lubrication grooves shown in Figure 4. c

Figure 7 is a detail horizontal sectional 35 view showing the outer cylinder and the valves with the inner cylinder and piston removed. 1

Figure 8 is a view similar to Figure 7, showingv the manner of adjustment of the valves so that they may be removed through the top of the outer cylinder.

Figure 9 is a view of Figure 8; w

Figure 10 is a detail view taken on line 10-10, Figure 5, with parts removed.

Figure 11 is a front elevation of Figure Figure 12 is a side elevation of Figure 11. Referring more particularly to the drawings the numeral 15 designates a casing at,

the upper end? of which-is supported an outer cylinder 16., 7'

Within the casing 15 and beneath the cylinder 16 a basemembe'r 17, upon which is supported an inner cylinder 18. lower end of the inner cylinder is reduced as at 19 to'forin a circumferential shoulder 20,,Ithe reduced portion 19 projecting into an opening in the base 17, and encompassing the reduced portion of the cylinder and within the base 17'is'a space21 for a cooling-medium such as water or the like. j j

The cylinder above the base 17 is provided with a space 22 extending 'thereabout anda communicating passage 23 is provided between the spaces 21 and 22 for the circulation o t e fl id, a'p ing 24 b g p ed to form a' fluid tight joint.

j The inner cylinder is provided with a closed end 25; having an openrecess 26 therein and a head 27 is provided for the inner and outer cylinder. The head is provided with lugs or projections 28 which co-operlate with lugs or projections 29on the outer cylinder, and fastening bolts 30 pass through lugs 28 and 29 for securing the head 27 in position.

The head 2711s provided with a downwardly opening recess 31which co-operates with the recess 26, to form a space forcooling fluid so and packing 32 may be provided between the end of the cylinder and the head to form a fluid tight, joint.

The head 27 is provided with a recess 33 in which a sparkplug 34 is located and the plug is seated in an opening in the head 25 of th nne y ind ri The inner and outer cylinders are arranged in spaced relation and registering intake ports. 35 3,6. and registering outlet ports 37 -38 are arranged in the cylinders. r

The head 27 is provided with a space 39.

thereinwhich communicates with the space between the inner and outer cylinder, and the space 39 in the head is preferably slightly greater in size than the space between the cylinders.

' Reciprocable within the space between the, cy i de s a d enc mp g the inner cy nder are two semi y nd ical v l 4 and 1 The 55 tance short of each other fora purpose'to be the usual manner;

, will work in opposition to each other.

hereinafter set forth.

Each of the valves 40 and 41 is provided A A g H v i to supply the lubrlcant to the other 011 with an enlarged portion 44 on the outer face of their lower ends, having a dove-tailedire-p cess 45 for the reception of a plug 46, which latter is held in position by" means of a-fas tening screw 47. Spaced eyes 48 are provided on the plug by means jofwhich one end of a link 49 is pivotally connected as at5O.

The other end of the link is pivotally connect-- ed as at 51 to a crank 52 which is rotatable in The link "44 is of such a length that the valves 40 and 41 will open and close on both the up and down stroke and the valves 40 and 41 are so arranged that they That is when one of the valves is moving in one direction the other valve will move in the 0pposite direction. lVithin the inner cvlinder 18 is a piston 53 which is connected with'aerank shaft 55.

Encompassing the intake and the exhaust ports of the inner cylinder and on the outer face of the inner cylinder are grooves 56 for the reception of oil, and extend completely on the outer faceof the inner cylinder pref erably to encompass and are spaced from the oil grooves 56.

Arranged in the inner face of the outer cylinder and preferably adjacent the oil grooves 56 are additional oil grooves 58*, which encompass and extend about the re-v spective intake and exhaust ports. Additional oil grooves 59 are arranged in the in ner face of the outer cylinder 16, encompassing the ports therein and extending about the oil grooves 58 so that the force of explosion in the inner cylinder when directed against the slide valves will force the valvesagainst the inner face of the outer cylinder and the oil grooves in the cylinder face being filled with oil will form a cushion for the slide valves, while the oil-grooves on theouter face of the inner cylinder will seal thespace be tween the piston and the cylinder'against escape of compression.

The valve members'are provided with oil grooves 60 ontheir inner faces spaced from the ports or passages 42 therein and extending in directions transverse to the length of the slide valve. V v

. Similar grooves Glare provided on'the outer faces of the piston members and "are by means of a' link 54 spaced from the ports therein and extend in directions transverse to the length of the valve.

The groovesfil 1n the piston members serve,

the slide valves are lowered, so that the grooves 60 and 61 will be filled with lubricant. .These grooves also serve as a means grooves and all of the oil grooves in the outer face of the piston and the inner face of the outer cylinderbeing filled with liquid,

will form a cushion, while the grooves on the outer face of the innercylinder and the inner face ofthe piston members will seal the space against the escape of compression.

The inner cylinder 18 is not fastened to any support but is supported by the shoulder.

20 resting upon the base 17. The head27 contacts with the inner cylinderand alsowith the outer cylinder and by drawing the head the other as indicated in Figure 8, so that the I slide valves may be removed through the top of the cylinder.

Lubrioant is supplied to the space 39 with in the head 27 by means'of suitable pipes .63, and these pipes are supplied with lubricant by means of a pipe 64 which has communication with any suitable source of supply of lubricant, the lubricant "being forced through the pipe 64 and up into the pipe 63 in any desired or suitable manner.

' While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without deoartingfrom the spirit of this invention. v 1 i 7 What is claimed as new is I I 3 1. An internal combustion engine embodying an inner and an outer cylinder arranged in spaced relation and having registering intake and exhaust ports therethrough, a removable head .for the outer cylinder, said inner cylinder being removable through said open end of the outer cylinder, semi-cylindrlcal valves arranged within said space between the cylinders and extending in direceach other whereby when the inner cylinder is removed from the outer cylinder and the valves detached from their respective oper-' ating means, said valves may be bodily and laterally moved relatively one toward the other to permit their removal through the end of the outer cylinder.

2. An internal combustion engine embodying an outer cylinder open at its top, an inner cylinder removably supported within the outer cylinder, a support upon which the innercylinder rests, a head for the open end of the outer cylinder, means for removably securing the head in position, said head co-operating with the said support for clamping and securing the inner cylinder in position, a portion of the inner cylinder telescoping into the sald support, and spaced semi-circular valves encompassing the inner cylinder and disposed between the cylinders, the inner cylinder being removable through the open end of the outer cylinder, said valves when detached from their operating means being movable toward each other and removable separately through the end of the cylinder.

In testimony whereof I have signed m name to this specification on this 20th day of 7 August, A. D. 1927.

WVILLIAM O. DUNN. 

